Stone sawing machine



Filed Feb.

G w w i B m m j w E 0 6 7 l w ZJW? 0 m: 9 M (N H. ,r P 0 ,7 v C QCFTTOAIVEXS 'Patent ecl Mar. 14, 1939 v UNITED STATES PATENT OFFICE 3Claims.

This invention relates to stone sawing machines of the type employingendless wire means adapted to bear against andwear away the material tobe out, which is commonly utilized in conjunction with an abrasivesubstance directed tothe point of contact of the cutting Wire with thematerial to be cut.

Itis an object of the invention to provide a cutting device of the typegenerally described llrabove, of simple construction, readily portable,and which may be secured to a block of material to be cut, so that thelatter acts as a support for the device during the cutting operation. Incarrying out the invention I provide a hori- 5 -1 zontal frame adaptedto extend over and be secured to a block of the material to be out,which frame has associated therewith vertical supports movable up anddown with respect to the frame, and provided with pulleys over which anendless 20 wire is trained. One of the supports carries a motor or othersource of power for rotating one of the pulleys and thereby impartingmovement to the endless means, and the other of said supports carries aweight serving as a counter-balancing means whereby to enable thesupports to move downwardly corresponding distances at the same time, asthe cutting operation progresses.

The cutting function is accomplished by the action of the moving endlesswire upon the material to be cut, in conjunction with the bearing forceimparted to said endless means, by reason of the weight of the supports,which includes, in the case of one of them, the motor or other source ofpower carried thereby, and, in the case .3 of the other, thecounterbalancing weight.

The invention is now to be particularly described in connection with thedrawing, in which- Figure l is a top view of a device of the present .0invention, showing it in position for the cutting operation upon a blockof stone. Figure 2 is a side view of said device.

Figure 3 is an end view looking in the direction of the arrows 33 ofFigure 2.

The letter A generally designates the frame of the device, whichcomprises two longitudinal members, I and 2, which are connected neartheir ends with transverse members 3 and 4. longitudinal members I and 2are provided at the undersides thereof with opposing angle clampingbrackets 5, two of which are provided on the underside of eachlongitudinal member. Said angle brackets are provided with adjustableclamping members 6 whereby the brackets may be clamped at opposite sidesof a slab of stone The or other material to be cut, such as indicated at1.

Bearing members H are slidably mounted for longitudinal adjustmentrespecting said transverse members 3 and 4. For this purpose a 5 grooveand tongue connection is employed, the tongue portions 23 of thetransverse members fitting the grooves 24 of the bearing members. Thebearing members are provided with clamping bolts 25 and said transversemembers are marked with corresponding indicia 26 for .enablingadjustments of the bearing members to corresponding portions on thetransverse members.

Mounted upon the support 8 is a bracket I! to which is secured anelectric motor l3 which is drivingly connected by a shaft M to pulleyI5. Pulleys l6 are provided at the lower ends of the supports 8 and 9and near the upper end of the support 9. Trained over said pulleys l5and I6 is an endless wire I I. Said wire I! may also be trained over apulley I8 which may be pivotally connected with the support 8, as shown,or have spring connection with the said support 8 so as to provideautomatic tensional adjustment for the endless wire I 1 to maintain thesaid wire upon the pulleys l5 and I6.

A counterbalancing weight [9 is provided on the support 9 tocounterbalance the weight of the motor [3 on the support 8 so that thesupports may be enabled to move downwardly equal distances at the sametime, as the cutting operation progresses.

In operation the frame A is secured to a block of stone 1 so that thesaid frame is horizontally disposed with respect thereto and above thesaid block. The opposing clamping brackets 5, which are adjustablelongitudinally of the frame mem bers l and 2, are adjusted so as to abutthe opposing faces of the block of stone, and the 0 clamping members 6are then tightened to rigidly secure the frame to the block. Thesupports 8 and 9 have previously been raised so that the wire ll bearsagainst the upper face 20 of the block of stone, and the motor I5 isthen started into operation to impart movement. to the wire ll, whichthen wears against the stone. The weight of the supports 8 and 9carrying the wire IT, by reason of the weight of the motor l5 carried bythe support 8 and the counterbalancing weight l9 carried by thesupport'S, causes the wire H to bear against the block of stone withconsiderable pressure.

As' the cutting operation progresses, by reason of the movement of theendless wire I! in wearing away the stone, the supports move downwardlyby gravity so as to constantly maintain the hear-- ing pressure of theendless wire i1 upon the stone. As previously mentioned, the supports 8and 9 move downwardly, under the force of gravity, substantiallycorresponding degrees because of the fact that the weight of eachsupport is the same.

In conjunction with the cutting operation performed by the wearingaction of the endless wire, it may be desirable to provide for thefeeding of an abrasive substance such as a mixture of sand and water tothe point of contact of the said wire with the stone during the cuttingoperation. For this purpose a container such as indicated at 2|,containing such abrasive substance, may be provided with a down spout 22directed to the point of contact of the wire with the stone. Thecontainer may be separate from the device of the invention, or it may beattached in any suitable manner to the frame or one of the supports tomove with the latter and thereby continuously supply the abrasivemixture at the desired point.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States, is-

1. In a device of the class described, in combination, a frame, verticalsupports guidingly associated with said frame, pulleys carried by saidsupports,'an endless member trained over said pulleys and adapted tobear against said material, means carried by one of said supports fordriving said endless means, and counterbalancing means carried byanother of said supports for enabling said supports to move down-'wardly correspondingly respecting time and distance by gravity as thecutting operation progresses.

2. In a device of the class described, in combination, a frame adaptedto rest on the stone or work to be cut, cutting means vertically movablerespecting said frame, and means for guiding said cutting means in itsvertical movement, said cutting means being movable downwardlyrespecting said frame as the cutting operation progresses, and memberssupporting said guiding means on the frame horizontally adjustablerespecting said frame.

3. In a stone sawing machine, in combination, a frame comprising spacedlongitudinal and horizontal members adapted to rest upon the stone to becut, cross members carried by said horizontal members, stone engagingclamping members also carried by said horizontal 'members to secure thesame rigidly to the stone to be operated on by cutting means, verticalguiding means mounted upon the cross members aforesaid, cutting meansoperating about said vertical guiding means so as to be removablevertically and fed by the guiding means to the stone for cutting actionthereon,

a and supporting members for said vertical guiding means arranged toslide horizontally along the cross members of the frame, whereby saidguiding means may be adjusted in a horizontal direction to bring thecutting means to new positions for cutting work upon the stone to whichthe frame is clamped or secured.

CHARLES B. LANSING.

